package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.SetmealService;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;


@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list != null && !list.isEmpty()) {
            ShoppingCart cartService = list.get(0);
            cartService.setNumber(cartService.getNumber() + 1);
            shoppingCartMapper.updateNumberById(cartService);
        }
        else{
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId != null) {
                Dish dish = dishMapper.queryById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            } else {
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        Long currentId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(currentId)
                .build();
        return shoppingCartMapper.list(shoppingCart);
    }

    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        Long dishId = shoppingCartDTO.getDishId();
        Long userId = BaseContext.getCurrentId();
        if (dishId!=null){
            ShoppingCart shoppingCart = shoppingCartMapper.getByDishIdAndFlavor(shoppingCartDTO,userId);
            subShoppingCart(shoppingCart);

        }
        else {
            Long setmealId = shoppingCartDTO.getSetmealId();
            ShoppingCart shoppingCart = shoppingCartMapper.getBySetmealId(setmealId,userId);
            subShoppingCart(shoppingCart);
        }
    }

    @Override
    public void clean() {
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }

    private void subShoppingCart(ShoppingCart shoppingCart) {
        if (shoppingCart.getNumber()==1){
            shoppingCartMapper.deleteById(shoppingCart.getId());
        }
        else {
            shoppingCart.setNumber(shoppingCart.getNumber()-1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }
    }
}
